Step 1: Post a nice 500 gold bounty on the priest. Bounties are anonymous.
Step 2: Let an infil from another realm know where the priest is--you certainly wouldn't want an infil from your own realm to stab them.
Step 3: make sure that all of your realms' nobles are out of the region when the stabbing occurs, for deniability.
Genius. Allison already has one of the highest bounties! Stab away. She is in Zuma lands right now so come get her! I like drama.
